Aristeo Dimaunahan better known as Aris Dimaunahan (born March 21, 1978 in Lipa, Batangas) is a Filipino professional basketball player who last played for the Alaska Aces in the Philippine Basketball Association and is currently playing for the San Miguel Beermen in the Asean Basketball League.
He attended Grace Kindergarten, Canossa Academy and graduated from De La Salle-Lipa in 1994. He also attended the University of Santo Tomas after high school. He played in the Philippine Basketball League in his early years before being drafted by the Barangay Ginebra Kings in 2002. He was also recognized by then-Mayor Vilma Santos as the second PBA player from his hometown in Lipa City after Melchor Teves, who also graduated from De La Salle Lipa.
Dimaunahan was also part in one of the most controversial trades in the PBA involving Rudy Hatfield, Billy Mamaril, Rafi Reavis, and Ervin Sotto.
After playing 2 seasons with the Barako Bull Energy Boosters, he was signed by the Alaska Aces as a free agent during the 2011 Governors Cup.